it’s just her normal voice 😭 In the audio snippet, we hear a romantic interlude in the background with Lady Gaga as Harley Quinn telling Joker “You can do anything you want…you’re Joker.” ...
He's not named or identified, but, out of focus in the background, he can be seen ... sequences are much easier to identify. Anytime Harley and Joker break out into full on, choreographed song ...